# -*- coding: utf-8 -*-
"""
Created on Tue Apr 30 09:12:37 2019

@author: yaoyu
"""

from random import random

def printInfo():
    print('这个程序模拟两个选手A和B的某种竞技比赛')
    print('程序运行需要A和B的能力值(以0和1之间的小数表示)')

def getInputs():
    a = eval(input('请输入选手A的能力值(0-1): '))
    b = eval(input('请输入选手B的能力值(0-1): '))
    n = eval(input('模拟比赛的场次: '))
    return a, b, n

def gameOver(a,b):
    return a==15 or b==15

def simOneGame(probA, probB):
    scoreA, scoreB = 0, 0
    serving = 'A'
    while not gameOver(scoreA, scoreB):
        if serving == "A":
            if random() < probA:
                scoreA += 1
            else:
                serving="B"
        else:
            if random() < probB:
                scoreB += 1
            else:
                serving="A"
    return scoreA, scoreB    

def simNGames(n, a, b):
    winsA, winsB = 0, 0
    for i in range(n):
        scoreA, scoreB = simOneGame(a, b)
        if scoreA > scoreB:
            winsA += 1
        else:
            winsB += 1
    return winsA, winsB

def printSummary(winsA, winsB):
    n = winsA + winsB
    print('竞技分析开始, 共模拟{}场比赛'.format(n))
    print('选手A获胜{}场比赛, 占比{:0.1%}'.format(winsA, winsA/n))
    print('选手B获胜{}场比赛, 占比{:0.1%}'.format(winsB, winsB/n))


def main():
    printInfo()
    a,b,n = getInputs()
    winsA, winsB = simNGames(n, a, b)
    printSummary(winsA, winsB)
    
if __name__ == '__main__':
    main()
